HP Dx2250 HP Compaq dx2250 Business PC, Service Reference Guide, 1st Edition - Page 116
Run Computer Setup and Diagnostic utilities., Parity RAM failure.
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Table C-1 Numeric Codes and Text Messages (continued) Control panel message Description Parity Check 2 System will not boot without fan Parity RAM failure. CPU fan not installed or disconnected in VSFF chassis. Recommended action 3. Ensure that none of the keys are depressed. 4. Replace keyboard. Run Computer Setup and Diagnostic utilities. 1. Remove the computer cover, press the power button, and see if the processor fan spins. If the processor fan is not spinning, make sure the fan's cable is plugged onto the system board header. Ensure the heatsink is properly seated and installed. 2. If the fan is plugged in and the heatsink is properly seated but the fan does not spin, then replace the heatsink-fan assembly. 110 Appendix C POST Error Messages ENWW
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